STM Spectroscopic Mapping of Quasi-Particle States in the Vortex State of CeCoIn$_5$

ORAL

Abstract

The superconducting properties of the heavy-fermion CeCoIn$_5$ emerge from a remarkable backdrop of strong electron correlation and magnetic criticality. Fittingly, this superconducting phase is itself remarkable, displaying signatures of unconventional pairing with (d-wave) line nodes in the order parameter and a Pauli-limited upper critical field below 700 mK [1]. Through scanning tunneling microscopy at milli-kelvin temperatures, we present, for the first time, atomically-resolved spectroscopy of CeCoIn$_5$ as the application of a magnetic field weakens and eventually destroys superconductivity.\\[4pt][1] J. D. Thompson and Z. Fisk, J. Phys. Soc. Jpn. \textbf{81}, 011002 (2012).

*Research funded by DOE and NSF.

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Authors

  • Brian Zhou

    • Princeton University

  • Shashank Misra

    • Princeton University

  • Pegor Aynajian

    • Princeton University

  • Eduardo da Silva Neto

    • Princeton University

  • Ryan Baumbach

    • Los Alamos National Laboratory

  • J.D. Thompson

    • Los Alamos National Laboratory

  • Eric Bauer

    • Los Alamos National Laboratory

  • Ali Yazdani

    • Princeton University